Question 210965
Rewrite using only positive exponents:
1). {{{3^(-1)+1/3^1 =1/3+1/3}}}={{{2/3}}}
2). {{{(2.5)^(-2) = 1/(2.5)^2}}}={{{0.16}}}
3). {{{8/8^(-2) = 8*8^2}}}={{{8*64 = 512}}}